Muscles, Part 2 - Organismal Level 
Muscles, Part 2 - Organismal Level
by Crash Course
Video Lecture 22 of 47
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Views: 582
Date Added: August 11, 2016

Lecture Description

Hank calls in a friend to do his push ups for him today to explain how skeletal muscles work together to create and reverse movements. Hank and Claire also demonstrate the role size plays in motor units, the three phase cycle of muscle twitches, and how the strength and frequency of an impulse affects the strength and duration of a contraction. This episode also explains twitch summation, tetanus, and isotonic vs. isometric movements.

Table of Contents
Skeletal Muscles Work Together to Create and Reverse Movements 1:14
Motor Units 3:52
Three Phases of Muscle Twitches 4:41
Strength and Frequency of Impulses 5:29
Strength and Duration of a Contraction 5:29
Twitch Summation vs Tetanus 6:19
Isotonic vs Isometric Movements 8:50

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Course Index

Course Description

In this Crash Course series, Hank Green teaches most of what you should know about anatomy and physiology, perfect for a freshman-level biology course, or just your own curiosity about the human body.

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